Not only that, but when this occurs the battery is sure to drain over night if I don't disconnect it. This also doesn't constantly happen, but when it does a drained battery is a sure thing the next morning. I have a trusty mechanic who hooked up the car and can measure the drain...but where is it?! Unknown. Any ideas what it is or an idea of who can find the problem in the Los Angeles area?

 

Sure it's not a bad ground somewhere??